Node.js Express

// Require what we need
var http = require("http");
// Build the server
var app = http.createServer(
function (request, response) {
response.writeHead(200, {
"Content-Type": "text/plain"
});
response.end("Hello world!");
});
// Start that server
app.listen(1337, "localhost");
console.log("Server running at http://localhost:1337/");

http.createServer(function (req, res) {
// Homepage
if (req.url == "/") {
res.writeHead(200, { "Content-Type": "text/html" });
res.end("Welcome to the homepage!");
}// About page
else if (req.url == "/about") {
res.writeHead(200, { "Content-Type": "text/html" });
res.end("Welcome to the about page!");
}
// 404'd!
else {
res.writeHead(404, { "Content-Type": "text/plain" });
res.end("404 error! File not found.");
}
}).listen(1337, "localhost");

function myFunMiddleware(request, response, next) {
// Do stuff with the request and response.
// When we're all done, call next() to defer
// to the next middleware.
next();
}
Middleware Middleware Middleware

var connect = require("connect");
var app = connect();
http.createServer(app).listen(1337);
// Add some middleware
app.use(function (request, response) {
response.writeHead(200, { "Content-Type": "text/plain"
response.end("Hello world!n");
});
// Add some middleware
app.use(connect.logger());
app.use(connect.Security);
app.use(connect.Routing);
...

app.get('/users/:id?', function (req, res, next)
{
var id = req.params.id;
if (id) {
// do something
} else {
next();
}
});
{
path: '/user/:id?',
method: 'all' | 'get' | 'post' | 'put' | 'delete',
callbacks: [ [Function] ],
keys: [ { name: 'id', optional: true } ],
regexp: /^/user(?:/([^/]+?))?/?$/i,
params: [ id: '12' ]
}

// home.js file in Routing folder.
module.exports = function (app) {
// home page
app.get('/', function (req, res) {
res.render('index', { title: 'Home Page. ' })
});
// about page
app.get('/about', function (req, res) {
res.render('about', { title: 'About Me. ' })
});
}
// Include a route file
require('./routes/home')(app);

app.get('/users/:id?', function (req, res, next) { ... }
'/:controller/:action/:id'

// all environments
app.configure(function() {
app.set('title', 'My Application');
});
// development only
app.configure('development', function() {
app.set('db uri', 'localhost/dev');
});
// production only
app.configure('production', function() {
app.set('db uri', 'n.n.n.n/prod');
});

app.use( express.bodyParser() );

app.put('/', function(){
console.log(req.body.user);
res.redirect('back');
});
<form method="post" action="/">
<input type="hidden" name="_method" value="put" />
<input type="text" name="user[name]" />
<input type="text" name="user[email]" />
<input type="submit" value="Submit" />
</form>
app.use(express.bodyParser());
app.use(express.methodOverride());

app.use(app.router);
app.use(function(err, req, res, next){
// logic
});
app.use(app.router);
app.use(logErrors);
app.use(clientErrorHandler);
app.use(errorHandler);

// Start Express
// Set the view directory to /views
app.set("views", __dirname + "/views");
// Let's use the Jade templating language
app.set("view engine", "jade");

app.get('/', function (req, res) {
res.render( 'index.jade', { title: 'My Site' } );
});
View file
Model

res.render('page',
{ layout: 'mylayout.jade'
});
partial('header', headerData );Partial View
Partial View
View
Layout
partial('footer', footerData );

Node.js Express

Node.js Express

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